package com.sky.controller.user;

import com.sky.constant.StatusConstant;
import com.sky.entity.Dish;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController("userDishController")
@RequestMapping("/user/dish")
@Api(tags = "C端-菜品浏览接口")
@Slf4j
public class DishController {

    @Autowired
    private DishService dishService;

    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 根据分类id查询菜品
     *
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public Result<List<DishVO>> list(@RequestParam Long categoryId){


        //构造redis中的key，规则：dish_分类id
       String key = "dish_" + categoryId;

        //重redis中查询是否缓存
        List<DishVO> list= (List<DishVO>) redisTemplate.opsForValue().get(key);

        if(null !=list && list.size()>0){
            //存在直接返回
            return Result.success(list);
        }


        Dish dish=Dish.builder()
                .status(StatusConstant.ENABLE)
                .categoryId(categoryId).build();
        list =  dishService.getDishById(dish);
        //如果不存在，查询数据库，将查询到的数据放入redis中
        redisTemplate.opsForValue().set(key,list);

        return Result.success(list);


    }
}
